Oscillator



FIG. 1 is a perspective view of an oscillator showing our new design;

FIG. 2 is a front elevational view showing the design for the oscillator of FIG. 1;

FIG. 3 is a rear elevational view showing the design for the oscillator of FIG. 1;

FIG. 4 is a right side elevational view showing the design for the oscillator of FIG. 1;

FIG. 5 is a left elevational view showing the design for the oscillator of FIG. 1;

FIG. 6 is a top plan view showing the design for the oscillator of FIG. 1; and,

FIG. 7 is a bottom plan view showing the design for the oscillator of FIG. 1.

The broken lines shown in the drawings illustrate portions of the oscillator that form no part of the claimed design. 

CLAIM The ornamental design for an oscillator, as shown and described. 